82978559 has 2 divisors, whose sum is σ = 82978560. Its totient is φ = 82978558.

The previous prime is 82978517. The next prime is 82978601. The reversal of 82978559 is 95587928.

It is a balanced prime because it is at equal distance from previous prime (82978517) and next prime (82978601).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82978559 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82978559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82972559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41489279 + 41489280.

It is an arithmetic number, because the mean of its divisors is an integer number (41489280).

Almost surely, 2^82978559 is an apocalyptic number.

82978559 is a deficient number, since it is larger than the sum of its proper divisors (1).

82978559 is an equidigital number, since it uses as much as digits as its factorization.

82978559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 53.

The square root of 82978559 is about 9109.2567753906. The cubic root of 82978559 is about 436.1695028034.

The spelling of 82978559 in words is "eighty-two million, nine hundred seventy-eight thousand, five hundred fifty-nine".